Thorn Trees on Y Das

In the middle of the North Western ridge of the Black Mountains stands "Y Das" - directly below is Rhos Fach common with numerous Thorn trees gradually thinning out with height on the slopes - and right near the top is a limestone outcrop with a prominent Thorn clinging on to it. 

I had spotted this tree on my many walks up, over and around this mountain and I finally took a closer look last week.

Here are the first few images from that walk......   (click to enlarge)